Christina Aguilera's arrest with current beau Matthew Rutler will not impact her custody agreement with ex-husband Jordan Bratman regarding their son Max, according to custody specialist Michael Kelly.

Kelly tells X17online exclusively:

"Fortunately for Christina Aguilera, she wasn't driving. The event had nothing to do with the child. The child wasn't present. There was no innate nor overt behavior reflecting on her parenting abilities."

As for whether Max's dad Jordan Bratman will be able to keep Matthew Rutler from seeing his son, Kelly adds:

"Courts do not ban the birth person's significant other from seeing the child. However, the other parent can order 'no alcohol or drugs for 24 hours' before the parent in question or her boyfriend sees the child.

There is no chance this incident will affect the custodial litigation in this case. There has to be a significant trend of behavior indicating the parent is a bad caregiver. One bad night out isn't going to change anything."

At the time of their separation five months ago, Christina had sought joint legal and physical custody. However in court papers filed last month, the couple said they had privately come to an agreement regarding custody of 2-year-old son Max.

Photos of Jordan and Max from this morning ... coming soon.

Find out when Jordan and Christina first met ... after the jump.

Christina and Jordan first met in 2002 while Jordan was working for Aguilera's music management company.